:root {
    --primary-bg: #ffffff;
    --secondary-bg: #f5f5f5;
    --dark-bg-hro: rgba(13, 27, 42, 0.5);
    --dark-bg: rgba(13, 27, 42, 1);
    --text-color: #333333;
    --light-text-color: #ffffff;
    --primary-accent: #007bff; /* Bright, energetic cyan/blue */
    --secondary-accent: #ff8c00; /* Orange accent */
    --font-sans-serif: 'Roboto', 'Inter', 'Montserrat', sans-serif;
}

body {
    margin: 0;
    font-family: var(--font-sans-serif);
    color: var(--text-color);
    background-color: var(--primary-bg);
    line-height: 1.6;
}

h1, h2, h3 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
}

h1 {
    font-size: 3rem;
    color: var(--light-text-color);
    text-align: center;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 2rem;
}

p {
    margin-bottom: 1rem;
}

section {
    padding: 4rem 2rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Hero Block */
.hero-block {
    background-color: var(--dark-bg-hro);
    background-image: url('img/hero_background.webp');
    background-size: cover;
    background-position: center;
    background-blend-mode: overlay;
    color: var(--light-text-color);
    padding: 6rem 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 80vh;
}

.hero-content p {
    font-size: 1.25rem;
    max-width: 600px;
    margin: 1rem auto 2rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 700;
    transition: background-color 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-accent);
    color: var(--light-text-color);
    border: 2px solid var(--primary-accent);
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-secondary {
    background-color: transparent;
    color: var(--light-text-color);
    border: 2px solid var(--light-text-color);
    margin-left: 1rem;
}

.btn-secondary:hover {
    background-color: var(--light-text-color);
    color: var(--dark-bg);
}

/* Problem/Opportunity Section */
.problem-opportunity .columns {
    display: flex;
    justify-content: space-around;
    gap: 2rem;
    margin-top: 3rem;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.problem-opportunity .column {
    flex: 1;
    text-align: center;
    padding: 1.5rem;
}

.problem-opportunity .icon {
    width: 80px;
    height: 80px;
    margin-bottom: 1rem;
}

/* Our Goal Section */
.our-goal {
    background-color:  var(--primary-bg);
}

.our-goal .goal-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.our-goal .goal-text {
    flex: 1;
}

.our-goal ul {
    list-style: none;
    padding-left: 0;
}

.our-goal li {
    background: url('img/checkmark.webp') no-repeat left center;
    background-size: 20px;
    padding-left: 30px;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.our-goal .goal-image {
    flex: 1;
    max-width: 500px;
}

.our-goal img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Collaboration Invite */
.collaboration-invite {
    background-color: var(--secondary-bg);
    text-align: center;
}

.collaboration-invite p {
    max-width: 700px;
    margin: 0 auto 2rem auto;
}

/* Access Block */
.access-block {
    text-align: center;
}

.access-block .note {
    font-size: 0.9rem;
    color: #666;
    margin-top: 1rem;
}

/* Footer */
#footer {
    background-color: var(--dark-bg);
    color: var(--light-text-color);
    padding: 2rem;
}

#footer .footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    flex-wrap: wrap;
}

#footer a {
    color: var(--primary-accent);
    text-decoration: none;
}

#footer a:hover {
    text-decoration: underline;
}

#footer p {
    margin: 0.5rem 0;
}

.footer-content > div {
    flex: 1;
    min-width: 280px;
    text-align: center;
}

/* --- Responsive Design --- */

@media (max-width: 992px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    section {
        padding: 3rem 1.5rem;
    }

    .problem-opportunity .columns {
        flex-direction: column;
        gap: 1.5rem;
    }

    .our-goal .goal-content {
        flex-direction: column;
        text-align: center;
    }

    .our-goal ul {
        display: inline-block;
        text-align: left;
        margin-top: 1rem;
    }

    .our-goal .goal-image {
        margin-top: 2rem;
        max-width: 450px;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .hero-block {
        padding: 4rem 1rem;
        min-height: 60vh;
    }

    .hero-content p {
        font-size: 1.1rem;
    }

    .cta-buttons {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .btn-secondary {
        margin-left: 0;
    }

    #footer .footer-content {
        flex-direction: column;
        gap: 1rem;
    }

    .footer-content > div {
        min-width: unset;
    }
}

/* --- Language Navigation --- */
.lang-nav {
    position: absolute;
    top: 1rem;
    right: 2rem;
    z-index: 10;
}

.lang-nav a,
.lang-nav span {
    color: var(--light-text-color);
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    padding: 0.25rem;
}

.lang-nav a.active {
    color: var(--primary-accent);
    cursor: default;
}

.lang-nav a:not(.active):hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .lang-nav {
        top: 0.5rem;
        right: 1rem;
    }
}